[Closed] Moving multiple keys for several objects?

Hi,
is there a command in maxscript to move multiple animation keys, for multiple selected objects?
Sometimes, when animation has a lot of frames it is not easy to move keys to desired place, for example if I select several object and keys of that objects, and if I want to move them by 50 frames I can’t move them with precision using mouse, it either move by 49 or by 51-52 frames.
Or, perhaps there is some keyboard shortcut that I dont know?

I tried to use max listener but there I can see that a line is generated for every selected object, so it is not usable to make a script for this problem. I need a solution to move keys of any selected object relative to present position.